The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.

A. what B. which

C. that D. though

A good friend of mine from I was born showed up at my home right before I left for Beijing．

A．how B．whom

C．when D．which

The little girl who got lost decided to remain _________she was and wait tor her mother.

A. where B. what

C. how D. who

She was so angry and spoke so fast that none of us understood _______ she said meant.

A. that B. what

C. that that D. what what

After _______ had happened he could not continue to work there.

A. which B. how

C. what D. having

—When ______ leave for Japan?

—When ______ leave for Japan is kept secret.”

A. they will, will they B. will they, they will

C. they will, they will D. will they, will they

Someone is ringing the doorbell. Go and see ______.

A. who is he B. who he is

C. who is it D. who it is

— What a mess! You are always so lazy!

—I’m not to blame, mum. I am ______ you have made me.

A. how B. what

C. that D. who

______ you are supposed to do ______ you don't like a thing is ______ it. Don't complain.

A. That; what; change B. When; that; to change

C. What; when; change D. What; that; changing

She has expressed her hope ______ the foreign students will spread the good will and sincerity of the Chinese people to other parts of the world.

A. that B. which

C. whether D. what